It is sort of a drone and is inspired by the agility of birds like crows and ravens. It can walk, hop, and even fly. Raven adapts bird biomechanics to robotic locomotion.

An adult raven is 22-27 inches long, weighs 24-57 oz., and has a wingspan of 47-59 inches. Crows are the same size as pigeons. An adult crow is 17-21 inches long, 11-21 oz. in weight, and has a ...

Ravens were fairly common here in the U.S. in the late 18th-century and early 19th-century, but the population was seriously reduced by the destruction of the bison herds, the ravens’ main source of ...